• Open Access

Emittance in nonlinear Thomson scattering

Erik Johnson, Elizabeth Breen, Geoffrey A. Krafft, and Balša Terzić
Phys. Rev. Accel. Beams 25, 054401 – Published 6 May 2022

Abstract

Inverse Compton scattering sources are finding increasing use as intense sources of high-energy photons. When operated at high field strength, ponderomotive detuning of the scattered emission can lead to decreased source performance. Up to now, the calculations of spectra for such nonlinear Thomson scattering have been done assuming a perfectly aligned electron interacts with the incident laser beam and several authors have investigated whether pondermotive detuning may be mitigated or cured by suitable incident laser chirping prescriptions. In order to determine if these chirping prescriptions are suitable in real beams with nonzero emittance, it is necessary to include misaligned boundary conditions in the electron motion and calculate the resulting spectra from the exact motion. In this paper we provide the exact solution for the electron equations of motion in the case of a misaligned electron passing through a laser pulse of high field strength. This solution is then used to calculate the scattered radiation distribution and we determine the emittance limits for the simplest chirping prescription.

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  • Received 7 October 2021
  • Accepted 7 April 2022

DOI:https://doi.org/10.1103/PhysRevAccelBeams.25.054401

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Accelerators & Beams

Authors & Affiliations

Erik Johnson1,*, Elizabeth Breen1,2, Geoffrey A. Krafft1,2, and Balša Terzić1

  • 1Department of Physics, Center for Accelerator Science, Old Dominion University, Norfolk, Virginia 23529, USA
  • 2Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA

  • *egrim007@odu.edu

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Vol. 25, Iss. 5 — May 2022

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